Harness system for patient transport apparatus

ABSTRACT

A harness system for a patient transport apparatus. The harness system comprises one or more harness assemblies. Each harness assembly comprises a flexible restraint member formed of a coated fabric and comprising one or more joints in which stitches join sections of the coated fabric. Covers are attached to the coated fabric over the stitches to provide a barrier to outside contaminants and to ease cleaning of the flexible restraint member.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.15/497,693 which was filed on Apr. 26, 2017, the disclosure of which ishereby incorporated herein by reference.

BACKGROUND

Patient transport apparatuses facilitate care of patients in a healthcare setting. Patient transport apparatuses comprise, for example,hospital beds, stretchers, cots, wheelchairs, and chairs. A conventionalpatient transport apparatus comprises a support structure having a base,a support frame, and a patient support surface upon which the patient issupported.

In some cases, a patient transport apparatus is needed to transport apatient to a hospital or other emergency medical facility in anemergency vehicle. During transport, it is desirable for the patient tobe safely and securely restrained to the patient transport apparatus fortheir own safety and the safety of emergency medical personnel or otherpeople within the emergency vehicle.

A harness system may be used to secure the patient to the patienttransport apparatus. It is desirable for the harness system to be ofsuitable strength to withstand certain crash events. Conventionalharness systems, however, comprise polyester webbing that may bedifficult to clean when dirt, grease, body fluids, and/or othercontaminants are trapped in the webbing. Typically, such harness systemsare discarded once they reach an undesirable, soiled condition.

A harness system designed to address and/or overcome one or more of theaforementioned challenges is desired.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side view of a patient transport apparatus.

FIG. 2 is a front view of the patient transport apparatus illustrating aharness system.

FIG. 2A is an illustration of securing a harness assembly of the harnesssystem to a support frame.

FIG. 3A is a top view of the harness system.

FIG. 3B is side view of the harness system.

FIG. 4 is a top view of a harness assembly of the harness system.

FIG. 5 is a top perspective view of the harness assembly of FIG. 4.

FIG. 5A is a close-up view of a joint of the harness assembly of FIG. 4.

FIG. 6 is a cross sectional view of a flexible restraint member of theharness assembly taken along line 6-6 of FIG. 5.

FIG. 7A is a cross-sectional view of the flexible restraint member takenalong line 7A-7A of FIG. 5 illustrating layers of the flexible restraintmember at the joint comprising coated fabric layers, stitches, adhesive,and covers.

FIG. 7B is a cross-sectional view of the flexible restraint member,similar to FIG. 7A, but illustrating an alternative location for theadhesive.

FIG. 8 is a cross-sectional view of the coated fabric layers joinedtogether with the stitches, but prior to attaching the adhesive and thecovers.

FIG. 9 is an exploded view showing the coated fabric layers joinedtogether with the stitches and showing the adhesive and covers.

FIG. 10 is a cross-sectional view of the flexible restraint member atthe joint prior to sealing the covers to the coated fabric layers alonga periphery of the covers.

DETAILED DESCRIPTION

Referring to FIG. 1, a patient transport apparatus 30 is shown forsupporting a patient in a health care setting. The patient transportapparatus 30 may comprise a hospital bed, stretcher, cot, wheelchair,chair, or similar apparatus utilized in the care of a patient. In theembodiment shown in FIG. 1, the patient transport apparatus 30 comprisesa cot that is utilized to transport patients in an emergency vehicle(e.g., an ambulance), such as from an emergency site to a hospital orother emergency medical facility.

The patient transport apparatus 30 shown in FIG. 1 comprises a supportstructure 32 that provides support for the patient. The supportstructure 32 comprises a base 34 and a support frame 36. The base 34comprises a base frame 35. The support frame 36 is spaced above the baseframe 35. The support structure 32 also comprises a patient support deck38 disposed on the support frame 36. The patient support deck 38comprises several sections, some of which are capable of articulatingrelative to the support frame 36, such as a back section 41, a seatsection 43, a leg section 45, and a foot section 47. The patient supportdeck 38 provides a patient support surface 42 upon which the patient issupported.

The base 34, support frame 36, patient support deck 38, and patientsupport surface 42 each have a head end and a foot end corresponding todesignated placement of the patient's head and feet on the patienttransport apparatus 30. The construction of the support structure 32 maytake on any known or conventional design, and is not limited to thatspecifically set forth above. In addition, a mattress (not shown) may beprovided in certain embodiments, such that the patient rests directly ona patient support surface of the mattress while also being supported bythe patient support surface 42.

Side rails 44 are coupled to the support frame 36 and thereby supportedby the base 34. If the patient transport apparatus 30 is a hospital bedthere may be more side rails. The side rails 44 may be fixed to thesupport frame 36 or may be movable between a raised position in whichthey block ingress and egress into and out of the patient transportapparatus 30, one or more intermediate positions, and a lowered positionin which they are not an obstacle to such ingress and egress. In stillother configurations, the patient transport apparatus 30 may not includeany side rails.

Wheels 58 are coupled to the base 34 to facilitate transport over floorsurfaces. The wheels 58 are arranged in each of four quadrants of thebase 34 adjacent to corners of the base frame 35. In the embodimentshown, the wheels 58 are caster wheels able to rotate and swivelrelative to the support structure 32 during transport. Each of thewheels 58 forms part of a caster assembly. Each caster assembly ismounted to the base 34. It should be understood that variousconfigurations of the caster assemblies are contemplated. In addition,in some embodiments, the wheels 58 are not caster wheels and may benon-steerable, steerable, non-powered, powered, or combinations thereof.Additional wheels are also contemplated. For example, the patienttransport apparatus 30 may comprise four non-powered, non-steerablewheels, along with one or more powered wheels.

A pair of loading wheels 64 (only one shown in FIG. 1) may be coupled tothe support frame 36 to assist with loading of the patient transportapparatus 30 into the emergency vehicle and unloading of the patienttransport apparatus 30 out of the emergency vehicle. In the embodimentshown, the loading wheels 64 are arranged nearer the head end than thefoot end, but the loading wheels 64 may be placed in other locations tofacilitate loading and/or unloading of the patient transport apparatus30 into and out of the emergency vehicle, or for other purposes.

A lift device 70 is configured to raise and lower the patient supportsurface 42 between minimum and maximum heights relative to the floorsurface and intermediate heights therebetween. The lift device 70 may beconfigured to operate in the same manner or a similar manner as the liftmechanisms shown in U.S. Pat. No. 7,389,552 or 7,398,571, both of whichare hereby incorporated by reference in their entirety.

Referring to FIGS. 2-3B, a harness system 100 is employed on the patienttransport apparatus 30 to secure the patient on the patient supportsurface 42. The harness system 100 comprises one or more harnessassemblies (also referred to as restraints) that cooperate to secure thepatient to the patient transport apparatus 30. For instance, in theembodiment shown, the harness system 100 comprises shoulder harnessassemblies 102, connecting harness assemblies 104, 106 that connect tothe shoulder harness assemblies 102 and to each other, thigh harnessassemblies 108, 110, and ankle harness assemblies 112, 114.

Each of the harness assemblies 102-114 are configured to be attached tothe support frame 36 and/or the patient support deck 38, but could beattached at any suitable location on the patient transport apparatus 30.In the embodiment shown, referring to FIG. 2A, each of the harnessassemblies 102-114 comprises a connecting loop L that can be utilized toattach the harness assemblies 102-114. For instance, the connecting loopL may be passed through an opening at an anchor location A on thepatient support deck 38 and/or the support frame 36 and a remainder ofthe harness assembly 102-114 can be passed through the connecting loop Lto form a secure connection to the patient transport apparatus 30 at theanchor location A.

Referring to FIG. 2, the shoulder harness assemblies 102 are configuredto be secured to the patient support deck 38 and/or the support frame 36and placed over the patient's shoulders to form an X-shaped patternacross the patient's torso. As shown in FIGS. 3A and 3B, each of theshoulder harness assemblies 102 comprises a connecting loop L at one endand a connector C1. In the embodiment shown, the connectors C1 on theshoulder harness assemblies 102 comprise male insertion latches (e.g.,tongues) configured to be received in connectors C2, such as buckles,for releasably locking to the buckles (similar to seatbelt buckles onvehicles). The connectors C1, C2 may be latches, buckles, catches,carabiners, or other suitable connectors for connecting the shoulderharness assemblies 102 to the connecting harness assemblies 104, 106, orto connect any two of the harness assemblies 102-114 together, asdescribed herein.

The connecting harness assemblies 104, 106 are configured to be securedto the patient support deck 38 and/or the support frame 36. Each of theconnecting harness assemblies 104, 106 comprises a connecting loop L anda pair of connectors C1 and/or C2 so that the connecting harnessassemblies 104, 106 can be connected to the shoulder harness assemblies102 and to each other. In the embodiment shown, the connectors C1, C2 onfirst connecting harness assembly 104 comprise an insertion latch and abuckle. The buckle is configured to releasably receive the insertionlatch on one of the shoulder harness assemblies 102. The connectors C2on second connecting harness assembly 106 comprise two buckles. Onebuckle is configured to releasably receive the insertion latch on theother shoulder harness assembly 102 and another buckle is configured toreleasably receive the insertion latch on the first connecting harnessassembly 104 to be secured across a waist of the patient.

The thigh harness assemblies 108, 110 are configured to be secured tothe patient support deck 38 and/or the support frame 36 and connect toeach other across thighs of the patient. Each of the thigh harnessassemblies 108, 110 comprises a connecting loop L and a connector C1 orC2. In the embodiment shown, the connector C2 on first thigh harnessassembly 108 comprises a buckle and the connector C1 on second thighharness assembly 110 comprises an insertion latch configured toreleasably engage the buckle.

The ankle harness assemblies 112, 114 are configured to be secured tothe patient support deck 38 and/or the support frame 36 and connect toeach other across ankles of the patient. Each of the ankle harnessassemblies 112, 114 comprises a connecting loop L and a connector C1 orC2. In the embodiment shown, the connector C2 on first ankle harnessassembly 112 comprises a buckle and the connector C1 on second ankleharness assembly 114 comprises an insertion latch configured toreleasably engage the buckle.

Referring to FIGS. 4 and 5, the first connecting harness assembly 104 isshown in more detail. Although reference is made primarily to the firstconnecting harness assembly 104, the description that follows issimilarly applicable to the other harness assemblies, including thedescription of the materials forming the harness assemblies 102-114 andthe manner in which joints are formed in the harness assemblies 102-114to secure the connectors C1, C2 and/or to seal components of the harnessassemblies 102-114 from contamination.

The first connecting harness assembly 104 comprises an elongate flexiblerestraint member 120 that attaches to the connectors C1, C2. Theflexible restraint member 120 comprises first, second, and third jointsJ1, J2, J3. The first joint J1, a close-up of which is shown in FIG. 5A,creates a loop to which the connector C2 is attached, such as thebuckle. In some cases, the connector C2 is attached prior to forming thejoint J1. The second joint J2 forms the connecting loop L previouslydescribed. The third joint J3 is formed to seal a free end in the mannerdescribed below and to prevent the free end from sliding through aretainer 121 used to facilitate adjustment of an operative length of thefirst connecting harness assembly 104 between the second joint J2 andthe connector C1.

FIG. 6 is a slice cross-sectional view through the flexible restraintmember 120 outside of the first joint J1. The flexible restraint member120 comprises coated fabric 122. In the embodiment shown, a single,continuous belt/strap of coated fabric 122 is provided to create theflexible restraint member 120. Multiple belts/straps, connectedtogether, could be employed in other embodiments. The coated fabric 122comprises a fabric 124 that is surrounded on all sides by a coating 126.

The fabric 124 may comprise webbing, such as that formed by wovenfabric. The webbing may comprise polyester webbing or other suitablematerials. It is also contemplated that the fabric 124 may be formed ofnylon webbing, polypropylene webbing, cotton webbing, elastic webbing,and the like. The coated fabric 122 has a thickness suitable toaccommodate the connectors C1, C2. In some cases, the coated fabric 122has a combined thickness T1 (fabric 124 and outer layers of coating 126)of from 0.038 to 0.047 inches, from 0.040 to 0.045 inches, or of 0.047inches or less. In the embodiment shown, the coated fabric 122 has athickness T1 of about 0.042 inches. The fabric 124 may have a thicknessT2 of less than 0.047 inches, less than 0.046 inches, or less than 0.045inches. In some cases, the fabric 124 has a thickness T2 of from 0.025to 0.045 inches, from 0.030 to 0.040 inches, or from 0.030 to 0.035inches. In the embodiment shown, the fabric 124 has a thickness T2 ofabout 0.032 inches. Other thicknesses are also contemplated.

The coating 126 may be applied to the fabric 124 by spraying,lamination, extrusion and/or co-extrusion processes, dipping the fabric124 into the coating 126, moving the fabric 124 through the coating 126,molding the coating 126 onto the fabric 124, or the like. The coating126 may comprise polymeric material, such as polyurethane, or othersuitable materials to ease cleaning of the flexible restraint member120. The coating 126 may be non-porous and/or non-fibrous. The coating126 eases cleaning of the flexible restraint member 120 by providing asmooth, continuous, outer surface for wiping and thereby cleaning (ascompared to the fabric 124). The coating 126 may be waterproof,water-resistant, and/or impervious to contaminants, such as dirt,grease, and body fluids. By coating the fabric 124 with polyurethane orother similar material, users are able to more easily wipe contaminantsoff the flexible restraint member 120 as compared to uncoated fabric,which tends to trap such contaminants. The coating 126 may have across-sectional thickness (as shown in FIG. 6) surrounding all sides ofthe fabric 124 of from 0.001 to 0.01 inches, from 0.004 to 0.008 inches,or of at least 0.005 inches. In the embodiment shown, the coating 126has a thickness of about 0.005 inches. Other thicknesses are alsocontemplated.

Referring to FIG. 7A, a slice cross-sectional view through the flexiblerestraint member 120 at the first joint J1 is shown in detail. In theembodiment shown, the flexible restraint member 120 comprises multiplelayers of material at the first joint J1: two layers of the coatedfabric 122 secured to one another with stitches 128; adhesive 130; andcovers 132. FIG. 7B is similar to FIG. 7A, but with the adhesive 130located inside an outer periphery of the stitches 128. The first jointJ1 is configured in a manner that prevents the ingress of dirt, grease,body fluids, and/or other contaminants into the fabric 124 and/or thestitches 128 at the first joint J1.

Referring to FIG. 8, during manufacture, two sections S1, S2 of thecoated fabric 122 are first connected to one another with the stitches128 to form the two layers of the coated fabric 122 at the first jointJ1. The stitches 128 penetrate through the two layers of the coatedfabric 122 to join them together such that the stitches 128 are exposed,as shown by the arrows E. The stitches 128 may comprise nylon thread orother suitable thread. In one embodiment, the nylon thread is sized138/TEX 135/GOVT. FF. The stitches 128 may be provided in a stitchingpattern such as a box X stitch, double W stitch, diamond stitch,horizontal diamond stitch, or any other suitable type of stitchingpattern (see stitching pattern in FIG. 5A). Combinations of stitchingpatterns are also possible.

Referring to FIGS. 9 and 10, the adhesive 130 is applied over exposedsurfaces of the sections S1, S2 of the coated fabric 122 once thesections S1, S2 are connected together with the stitches 128. Theadhesive 130 may be applied to the sections S1, S2 inside an outerperimeter of the sections S1, S2. In this case, an outer perimeter ofthe adhesive 130 is spaced from the outer perimeter of the sections S1,S2. The adhesive 130 may be placed on the stitches 128 (see FIG. 7A) oraway from the stitches 128 (see FIG. 7B). The adhesive may be applied asrectangular patches of film/tape on the sections S1, S2 and/or thestitches 128, sprayed onto the sections S1, S2 and/or the stitches 128,or otherwise applied to the sections S1, S2 and/or the stitches 128. Inthe embodiment shown, the adhesive comprises a double-sidedself-adhesive tape, such as product no. 4965 manufactured by Tesa Tape,Inc. of Charlotte, N.C.

A covering is placed over the stitches 128 and the adhesive layers 130.In the embodiment shown, the covering comprises two separate covers 132formed of rectangular patches sized to have the same width as the coatedfabric 122 (other widths are also possible). In some cases, only asingle cover 132 is used that wraps around to cover the stitches 128 onopposing surfaces. The covers 132 may be formed of urethane film orother suitable material. The covers 132 may comprise smooth, continuous,outer surfaces. The covers 132 may be non-porous and/or non-fibrous. Thecovers 132 may be waterproof, water-resistant, and/or impervious tocontaminants to facilitate cleaning in the same manner as the coating126.

As shown in FIG. 10, the adhesive 130 bonds to both the coated fabric122 (e.g., the coating 126) on the sections S1, S2 and to the covers132. This helps to reduce air pockets that may otherwise form betweenthe coated fabric 122 and the covers 132 after the covers 132 are sealedto the coated fabric 122 in the manner described below. The covers 132may have a thickness T3 (see FIG. 9) of from 0.002 to 0.02 inches, from0.005 to 0.02 inches, or from 0.01 to 0.018 inches. In the embodimentshown, each of the covers 132 has a thickness of about 0.015 inches.Other thicknesses are also contemplated.

Referring briefly back to FIGS. 5A and 7A, the covers 132, once inposition over the sections S1, S2, are sealed to the coating 126 inperipheral sealing bands B along the perimeters of the sections S1, S2.The bands B may have a width of from 0.03 to 0.2 inches, from 0.05 to0.15 inches, or from 0.05 to 0.12 inches. One band B is shown in FIG. 5Aon one side of the first joint J1, but a similar band B is also presenton the opposite side of the first joint J1.

The covers 132 may be sealed along their entire outer peripheries to thesections S1, S2 by any suitable sealing method, such as ultrasonicwelding, radio frequency (RF) welding, adhesive, other heat sealingmethods, or the like. In some cases, both the covers 132 are sealed tothe coating 126 simultaneously, for instance, by placing the entireconstruction of covers 132, adhesive 130, and sections S1, S2 in an RFwelding die. In this case, the bands B represent weld locations. Inother cases, such as when using adhesive, the covers 132 may be attachedseparately with adhesive placed along the bands B between the covers 132and the coating 126 on the sections S1, S2.

The covers 132 may be sized to have outer peripheries that extend beyondthe outer periphery of the stitches 128 so that the covers 132completely cover and provide a barrier between the stitches 128 andpossible outside contaminants. In the embodiment shown, the covers 132are sealed to the coating 126 outside the outer periphery of thestitches 128 such that the covers 132 and coating 126 have meldedtogether (see, e.g., FIG. 7A). By sealing the covers 132 outside thestitching pattern(s), the stitches 128 are able to move relative to oneanother inside the seal (e.g., inside the peripheral sealing band B).

Referring specifically to FIG. 5A, the manner in which the covers 132are sealed may additionally involve heating and/or compressing thecoated fabric 122 and covers 132 beyond the outer periphery of thecovers 132 such that the covers 132 meld and integrate into the coating126 of the coated fabric 122 to form a smooth and tapered transitionfrom the covers 132 to adjacent sections of the coated fabric 122, asshown. This can also be used to seal a free end 140 of the coated fabric122, which may have been cut during manufacturing and otherwise haveexposed fabric 124. By heating one of the covers 132 and/or coating 126to a suitable temperature, the material forming the cover 132 (e.g.,urethane) and/or the coating 126 (e.g., polyurethane) is able to flow toa space adjacent the free end 140 to cover the free end 140, as shown.The covers 132, which are ultimately exposed to contaminants, areconfigured to provide a smoother, more continuous surface for cleaningand wiping, as compared to the stitches 128, which would otherwise beexposed without the covers 132.

Referring back to FIG. 5, the second joint J2 is formed in a similarmanner as the first joint J1 described above except that the stitches128 are made in a circular pattern and the covers 132 have a circularshape to cover the stitches 128. The covers 132, at the second joint J2,have a diameter greater than a diameter of the circular stitch patternso that the covers 132 are able to be sealed to the coated fabric 122outside an outer periphery of the circular stitch pattern. For some ofthe harness assemblies 102-114, a similar first joint J1 is utilized tocreate the connecting loop L. See, for example, the harness assemblies102, 108, 110, 112, and 114 in FIG. 3B.

The third joint J3 is formed by sealing the other free end of the coatedfabric 122 (opposite the free end 140) to an adjacent section, withoutany stitches or covers, but in a manner that also seals the other freeend to eliminate any exposed fibers that may be present from the fabric124. This is useful when the coated fabric 122 is manufactured in longlengths and cut into smaller lengths having two free ends with exposedfabric 124. In one embodiment, during assembly, the coating 126 at theother free end, and/or the coating 126 on the adjacent section to whichthe other free end is being attached, may be heated such that thecoating 126 is flowable to seal off the fabric 124 at the other freeend. When heating the coating 126 around the other free end, a smoothand tapered transition can be provided at the other free end of thecoated fabric 122 with suitable dies, molds, etc. A similar third jointJ3 is used to seal a free end of the coated fabric 122 in the harnessassemblies 102, 110, and 114. In other embodiments, the free end of thecoated fabric 122 can be sealed in other ways and/or using othersuitable materials, such as adhesive, and the like. For instance, aseparate cover (not shown) could be attached over the free end andadhered to the adjacent section to provide a barrier that protects anyfabric 124 that would otherwise be exposed to contaminants.

As a result of the above-described construction of the flexiblerestraint member 120 and the joints J1, J2, J3 thereof, in theembodiment shown, there is no exposed fabric 124 or stitches 128 thatwould otherwise be susceptible to contamination and difficult to clean.In other words, the fabric 124 and stitches 128 are completely coveredand sealed by the coating 126 and/or covers 132 such that the flexiblerestraint member 120 has generally smooth outer surfaces that can beeasily cleaned after use. This will encourage continued reuse of theharness assemblies 102-114 and save costs associated with discardingsoiled harness assemblies.

In some embodiments, the harness system 100 is configured to meet orexceed the requirements set forth in the SAE technical standards J3027(which comprises SAE J2917 and SAE J2956). The harness system 100 mayalso be configured to meet or exceed the requirements set forth in theBritish Adopted European Standards BS EN 1789:2007 clause 4.5.9 and 5.4.One example of the harness system 100 that meets all the requirements ofthese standards is set forth below. In this example, each of theflexible restraint members 120 of the harness assemblies 102-114comprises a single, continuous strap of coated fabric having a thicknessof 0.042 inches and a width of 1.88 inches. The coated fabric 122comprises polyester webbing with a polyurethane coating. The coating 126has a thickness of 0.005 inches. The first and second joints J1, J2 areformed with the stitches 128 comprising nylon thread sized at 138/TEX135/GOVT. FF. The stitches 128 are provided in a stitching pattern thatcomprises a box X stitch pattern (for the first joints J1) or circularpattern (for the second joints J2). The adhesive 130 applied onto thestitching pattern comprises double-sided self-adhesive tape, such asproduct no. 4965 manufactured by Tesa Tape, Inc. of Charlotte, N.C. Thecovers 132 comprise urethane film that is RF welded to the coated fabric122. The covers 132 have a thickness of 0.015 inches.

It is to be appreciated that the terms “include,” “includes,” and“including” have the same meaning as the terms “comprise,” “comprises,”and “comprising.”

Several embodiments have been discussed in the foregoing description.However, the embodiments discussed herein are not intended to beexhaustive or limit the invention to any particular form. Theterminology which has been used is intended to be in the nature of wordsof description rather than of limitation. Many modifications andvariations are possible in light of the above teachings and theinvention may be practiced otherwise than as specifically described.

What is claimed is:
 1. A patient transport apparatus for transporting apatient, said patient transport apparatus comprising: a supportstructure having a base and a patient support surface; wheels coupled tosaid base; a harness system operable by a user to secure the patient tosaid patient support surface, said harness system comprising: aplurality of harness assemblies configured to be coupled to said supportstructure, each of said harness assemblies comprising: a connector; anda flexible restraint member coupled to said connector, said flexiblerestraint member comprising a fabric and a coating covering said fabric,said flexible restraint member comprising stitches securing first andsecond sections of said fabric together at a joint, wherein said fabricand said stitches are configured to be unexposed to contaminants duringuse.
 2. The patient transport apparatus of claim 1, wherein said supportstructure comprises a support frame movable relative to said base andsaid joint is located to provide a connecting loop configured tofacilitate coupling of each of said harness assemblies to said supportframe.
 3. The patient transport apparatus of claim 1, wherein said jointis located to provide a loop configured to engage said connector.
 4. Thepatient transport apparatus of claim 1, wherein two of said plurality ofharness assemblies comprise shoulder harness assemblies configured to becrossed over a torso of the patient in an X-configuration.
 5. Thepatient transport apparatus of claim 1, comprising a lift deviceconfigured to raise and lower the patient support surface.
 6. Thepatient transport apparatus of claim 1, comprising loading wheelscoupled to said support structure.
 7. The patient transport apparatus ofclaim 1, wherein said fabric comprises polyester webbing.
 8. The patienttransport apparatus of claim 7, wherein said fabric has a thickness offrom 0.030 to 0.040 inches.
 9. The patient transport apparatus of claim7, wherein said fabric has a thickness of less than 0.047 inches. 10.The patient transport apparatus of claim 1, wherein said coatingcomprises polyurethane.
 11. The patient transport apparatus of claim 10,wherein said coating has a thickness of at least 0.005 inches.
 12. Thepatient transport apparatus of claim 1, wherein said coating has asmooth outer surface to facilitate wiping of contaminants off of saidflexible restraint members.
 13. The patient transport apparatus of claim1, wherein said fabric and said coating have a combined thickness offrom 0.038 to 0.047 inches.
 14. The patient transport apparatus of claim1, wherein said stitches are formed of nylon thread and are placed in abox X stitch pattern.